Connector for coil or the like



July 21, 1964 w. o. HENSCHKE ETAL 3,141,923

CONNECTOR FOR con OR THE LIKE Filed Sept. 18, 1962 WILLIAM O. JoHNc,\ AN

United States Patent CONNECTOR FOR COIL OR THE LIKE William O. Henschke, Longmeadow, and John C. Van Amsterdam, Springfield, Mass., assignors to R. E. Phelon Company, Inc., a corporation of Massachusetts Filed Sept. 18, 1962, Ser. No. 224,319 3 Claims. (Cl. 174-59) This invention relates to a new and improved electrical connection for coils or the like and the method of making said electrical connection.

An object of the invention is to provide a new and improved electrical connection of the type set forth which prevents both leakage of high voltage electrical current and entrance of dirt, moisture, or similar foreign matter, and to mechanically retain the cable in proper position.

Another object is to provide a new and improved method for making an electrical coil of the type set forth Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings. It is understood that changes may be made in the details of construction and arrangement of parts shown and described as the preferred form of the invention is given by way of illustration only.

Referring to the drawings:

FIG. 1 is a top or plan view of an electric coil illustrating the invention;

FIG. 2 is a side view of the coil shown in FIG. 1 in combination with the means provided by the present invention;

FIG. 3 is a side view partially in section of the device shown in FIG. 2; and

FIG. 4 is a side view in section of the device shown in FIGS. 2 and 3.

Referring more particularly to the accompanying drawings wherein similar reference characters designate corresponding parts throughout the several views, the device shown embodying the invention comprises the primary and secondary coils and 11 connected to the leads 12, 13 and 2t) and the resilient spacing means 14 which is coated with adhesive on its opposite sides. Said spacing means 14 serves to maintain a tubular member 15 in position upon the coil 11 such that said tubular member 15 may be at a particular location in spite of normal variations in coil size. Said tubular member 15 may be composed of any suitable insulating material such as, for example, polycarbonate or other thermo-plastic, plastic, or a heat shrinkable material.

The tubular member 15 contains a tack or similar piercing contact making means 16 at its lower end in a liquid tight fit, said tack 16 being positioned in relation to the tubular member 15 such that the head of said tack 16 is below the base of said tubular member 15 and its point is within said tubular member 15. The upper end of said tubular member 15 is normally open.

The head of said tack 16 serves to make contact with the secondary wire 20. The tack 16 is connected to the conductor 17 contained in the cable 18, which cable 18 is inserted into said tubular member 15 through its upper open end.

The electrical connection between the point of the tack 16 and the conductor 17 is maintained and sealed through the crimping or deforming 15a of that portion of the tubular member 15 surrounding the cable 18 containing said conductor 17 through the use of a heated tool or by the preheating of said tubular member 15 and the use of a tool of room temperature. Through this manner, said electrical connection between the tack 16 and said conductor 17 is protected by a seal which serves to protect the tubular member 15 containing said connection and, hence, said connection from the entrance of dirt, moisture or other foreign matter. Likewise, such seal, thus provided, serves to prevent the leakage of high voltage electrical material.

The coils 10 and 11 are first made in any suitable con- 14 and the tubular member 15 containing said connection are enclosed in a casing or mold 19 and potted with suitable castable insulating material. If the member in which said potting was performed is a casing such as is shown in FIG. 4, the potted members are left in such after completion of the potting process; if said member is a mold, the potted members are removed therefrom after the completion of said process.

The method of making the aforedescribed device is as follows:

The coils 10 and 11 are first made in any suitable conventional manner and positioned in relation to each other as is shown in the accompanying drawings.

The tubular member 15 is attached to the coil 11 by means of the adhesive coated spacing means 14; with the tack or similar piercing contact making means 16 inserted in said tubular member 15 such that the relationship between said tack 16 and said tubular member 15 is as is illustrated in the drawings and the seal between said members is liquid tight. The secondary wire is then connected to the head of said tack 16.

The coil and tube assembly is then potted in a casing or mold 19 with suitable insulating material. If such potting is performed in a casing, the assembled coil-tubular member is left in such after the potting process is completed, if in a mold, the potted assembly is then removed from such mold.

The cable 18 containing the conductor 17 is then inserted through the open end of the tubular member 15 such that the conductor 17 contained in such cable 18 makes electrical connection with the point of the tack 16.

That portion of said tubular member 15 surrounding the cable 18 is then crimped or otherwise deformed through the use of a heated tool or by preheating the tube and using a tool at room temperature such that the deformed portion of said tubular member fits tightly around said cable 18.

Thus, a seal is created which serves to prevent the entrance of dirt, moisture or other foreign matter into the electrical connection while, at the same time, serving to prevent the leakage of high voltage electrical current, and mechanically secure the cable in operative position.

The operation of the, thus, completed device is believed to be apparent from the aforegoing description.

Thus, it will be seen that we have provided new and improved means for obtaining all of the objects and advantages of the invention.

We claim:

1. In a device of the character described, coil means, a tubular member comprised of insulating material connected to said coil means, an electrical lead in said tubular member, a pointed piercing contact making member extending into said tubular member and making contact with said electric lead, said tubular member being deformed a r 3 4 around said electrical lead in order to secure said lead in 3. The invention of claim 1 wherein an adhesively said tubular member. coated spacing member is positioned between said coil 2. In a device of the character described, coil means, means and Said tubular member j g and Securing a tubular member comprised of insulating material con- Said coil means and Said tubular member togethernected to said coil means, an electrical lead in said tubu- 5 Refer e Cited i the fil f i patent lar member, a pointed piercing contact making member N T P TE extending into said tubular member and making contact U I ED STATES A NTS with said electrical lead, said tubular member being 1372O65 Conklin 1921 i 2,410,321 Watts Oct. 29, 1946 crimped around said electrical lead in order to secure 2 914 600 Smith et 31 Nov 24 1959 said lead in said tubular member. 10

2,939,905 Canfield' June 7, 1960 

1. IN A DEVICE OF THE CHARACTER DESCRIBED, COIL MEANS, A TUBULAR MEMBER COMPRISED OF INSULATING MATERIAL CONNECTED TO SAID COIL MEANS, AN ELECTRICAL LEAD IN SAID TUBULAR MEMBER, A POINTED PIERCING CONTACT MAKING MEMBER EXTENDING INTO SAID TUBULAR MEMBER AND MAKING CONTACT WITH SAID ELECTRIC LEAD, SAID TUBULAR MEMBER BEING DEFORMED AROUND SAID ELECTRICAL LEAD IN ORDER TO SECURE SAID LEAD IN SAID TUBULAR MEMBER. 